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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/109514] [13 regression] -Werror=dangling-pointer false
 positive nn fheroes-1.0.3 (lambdas)
Date: Sat, 15 Apr 2023 02:19:40 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109514

--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The trunk branch has been updated by Jason Merrill <jason@gcc.gnu.org>:

https://gcc.gnu.org/g:9964df74a9e99e850bf9b0b6ff5c47133f846db8

commit r13-7190-g9964df74a9e99e850bf9b0b6ff5c47133f846db8
Author: Jason Merrill <jason@redhat.com>
Date:   Fri Apr 14 13:37:16 2023 -0400

    -Wdangling-pointer: fix MEM_REF handling [PR109514]

    Here we hit the MEM_REF case, with its arg an ADDR_EXPR, but had no
handling
    for that and wrongly assumed it would be a reference to a local variabl=
e.
    This patch overhauls the logic for deciding whether the target is somet=
hing
    to warn about so that we only warn if we specifically recognize the tar=
get
    as non-local.  None of the existing tests regress as a result.

            PR c++/109514

    gcc/ChangeLog:

            * gimple-ssa-warn-access.cc (pass_waccess::check_dangling_store=
s):
            Overhaul lhs_ref.ref analysis.

    gcc/testsuite/ChangeLog:

            * g++.dg/warn/Wdangling-pointer-6.C: New test.=